US4623767A - Disconnect switch for metal-clad, pressurized gas-insulated high-voltage switchgear with damping resistors - Google Patents

Disconnect switch for metal-clad, pressurized gas-insulated high-voltage switchgear with damping resistors Download PDF

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Publication number
US4623767A
US4623767A US06/700,540 US70054085A US4623767A US 4623767 A US4623767 A US 4623767A US 70054085 A US70054085 A US 70054085A US 4623767 A US4623767 A US 4623767A
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US
United States
Prior art keywords
moveable
disconnect
plates
resistors
disconnect switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/700,540
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English (en)
Inventor
Winfried Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT, A GERMAN CORP. reassignment SIEMENS AKTIENGESELLSCHAFT, A GERMAN CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCHULZ, WINFRIED
Application granted granted Critical
Publication of US4623767A publication Critical patent/US4623767A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/165—Details concerning the impedances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H01C1/034—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being formed as coating or mould without outer sheath
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/148—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals embracing or surrounding the resistive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Definitions

  • This invention relates to the field of metal clad, compressed-gas-insulated high-voltage switchgear and more particularly to resistors for use with such a disconnect switch, that prevent flashover through arc suppression and damping.
  • One method of preventing the propagation of high frequency oscillations is to use low conductivity, high permeability coatings as shown in U.S. Pat. No. 3,829,707 dated Aug. 13, 1974 and in F.R.G. Offenlegungschrift DE No. 3,216,275 dated Sept. 29, 1983.
  • the low conductivity and high permeability of the coating present a high impedance to dampen high frequency oscillations.
  • a disconnect switch for metal-clad, pressurized gas-insulated high-voltage switchgear with two field electrodes located on each side of the disconnect gap and at least one contact electrode slideably disposed within and in electrical contact with one of the field electrodes, with a maximum of one contact electrode associated with each field electrode, and a moveable insulating tube almost bridging the disconnect gap during the process of a switching action. Also during the process of a switching action, two moveable rods move inside the insulating tube as it is in the almost bridging position of the disconnect gap. Located along the longitudinal axis of and in electrically connected or connectable to each one of the moveable rods in a moveable resistor.
  • Each resistor has a thermally highly-conductive ceramic carrier with outer dimensions smaller than the inside diameter of the insulating tube.
  • the resistors are located in the disconnect gap at the outset of a switching action, bridging the gap after the disposition of the insulating tube into its almost bridging position during opening or closing of the connection between the field electrodes.
  • Each resistor has a plurality of elements spaced from each other and located between two metallic contact plates disposed on each end.
  • Each element is comprised of a ceramic plate having resistive material strips baked on one side thereof. The elements being physically and electrically connected between two contact plates and moulded into a resistor out of hardened cast resin between the contact plates.
  • the resistive material strips are baked on both sides of the ceramic plate.
  • FIG. 1 is a diagrammatic view of a longitudinal section view of a disconnect switch having damping resistors
  • FIG. 2 is a diagrammatic, longitudinal cross-sectional view of resistor in FIG. 1;
  • FIG. 3 is a front plan view of one of the resistor elements.
  • a movable insulating tube 9 Inside the stationary field electrode 4 on the left on the same axis is a movable insulating tube 9, whose outer diameter is smaller than the diameter of the edge 10 of the opening of the field electrode 4. Furthermore, along the longitudinal axis of the field electrodes 4, 5 lie two central conductive movable rods 11, on whose ends facing the disconnect gap 6 are mounted two cylindrical resistors 12. A conductive connection exists between the field electrodes 4, 5, respectively, and said rods 11 and the resistors 12, so that the resistors 12 have the potential of the field electrodes 4, 5 also.
  • the resistors 12, the insulating tube 9, and the movable contact electrode 7 all reside within the field electrodes 4, 5 and thus do not protrude into the disconnect gap 6.
  • the electrical field within the disconnect gap 6 thus depends upon the form of the field electrodes 4, 5 and is not disturbed by the parts within them.
  • the two resistors 12 are brought out symmetrically from both sides into the disconnect gap 6.
  • the disconnect gap 14 remaining between their end surfaces always lies in the center of the disconnect gap 6. If this remaining disconnect gap 14 has become sufficiently small, the pre-flashover arc 3 occurs between the two resistors 12.
  • a drifting of the pre-flashover arc 3 onto the metal enclosure 2 is not possible because of the shield provided by the insulating tube 9.
  • the symmetrical dampening provided by the resistors 12 during ignition or reignition of the pre-flashover arc 3 prevents the occurrence of high-frequency oscillations or dampens them significantly.
  • the resistors because they are electrically in series with any high frequency oscillations generated by the pre-flashover arcs, dissipate and dampen such oscillations thereby preventing flashovers induced by high frequency standing wave current peaks.
  • Such resistors must have high electrical resistance and low thermal resistance in the presence of high-voltage pre-flashover arcs to dissipate energy to the moveable rods and through outside surfaces to pressurized gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US06/700,540 1984-02-16 1985-02-11 Disconnect switch for metal-clad, pressurized gas-insulated high-voltage switchgear with damping resistors Expired - Fee Related US4623767A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3405850 1984-02-16
DE19843405850 DE3405850A1 (de) 1984-02-16 1984-02-16 Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen

Publications (1)

Publication Number Publication Date
US4623767A true US4623767A (en) 1986-11-18

Family

ID=6228103

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/700,540 Expired - Fee Related US4623767A (en) 1984-02-16 1985-02-11 Disconnect switch for metal-clad, pressurized gas-insulated high-voltage switchgear with damping resistors

Country Status (7)

Country Link
US (1) US4623767A (pt)
EP (1) EP0152718B1 (pt)
JP (1) JPS60189123A (pt)
BR (1) BR8500678A (pt)
CA (1) CA1260046A (pt)
DE (2) DE3405850A1 (pt)
SU (1) SU1327805A3 (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742423A (en) * 1985-11-22 1988-05-03 Nission Electric Company, Limited Gas insulated apparatus
US5689143A (en) * 1995-06-09 1997-11-18 Allen-Bradley Company, Inc. Arrangement of resistors for switching of capacitive loads in an electromagnetic switching device
EP1973133A2 (en) * 2007-03-22 2008-09-24 Korea Electro Technology Research Institute Circuit breaker using arc contact

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543815A1 (de) * 1995-11-24 1997-05-28 Asea Brown Boveri Elektrisches Schaltgerät
FR2753833B1 (fr) * 1996-09-20 1998-10-23 Disjoncteur de generateur avec resistance d'amortissement variable

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR478423A (fr) * 1914-04-24 1915-12-10 Georges Giles Interrupteur à l'air libre à résistances
DE822690C (de) * 1949-11-08 1951-11-26 Theodor Conrad Schaltstift fuer elektrische Wechselstromschalter
CA678008A (en) * 1960-02-05 1964-01-14 Westinghouse Electric Corporation Circuit interrupters
DE1216972B (de) * 1960-07-25 1966-05-18 Siemens Ag Elektrischer Widerstand fuer hohe Impulslasten
US3143622A (en) * 1960-10-28 1964-08-04 Westinghouse Electric Corp Arc-extinguishing unit and contact structure for a circuit interrupter
DE2704389C3 (de) * 1977-01-31 1980-06-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Trennschalter für metallgekapselte Hochspannungsschaltanlagen
DE3331819A1 (de) * 1983-09-01 1985-03-21 Siemens AG, 1000 Berlin und 8000 München Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742423A (en) * 1985-11-22 1988-05-03 Nission Electric Company, Limited Gas insulated apparatus
US5689143A (en) * 1995-06-09 1997-11-18 Allen-Bradley Company, Inc. Arrangement of resistors for switching of capacitive loads in an electromagnetic switching device
EP1973133A2 (en) * 2007-03-22 2008-09-24 Korea Electro Technology Research Institute Circuit breaker using arc contact
EP1973133A3 (en) * 2007-03-22 2009-11-11 Korea Electro Technology Research Institute Circuit breaker using arc contact

Also Published As

Publication number Publication date
DE3463197D1 (en) 1987-05-21
EP0152718B1 (de) 1987-04-15
JPH0447935B2 (pt) 1992-08-05
BR8500678A (pt) 1985-10-01
JPS60189123A (ja) 1985-09-26
EP0152718A1 (de) 1985-08-28
CA1260046A (en) 1989-09-26
SU1327805A3 (ru) 1987-07-30
DE3405850A1 (de) 1985-08-29

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Effective date: 19941123

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